thank you for replying cffisher.im a bit confused I have never done this before. I have looked at a lot of sights on the web. I am looking to find out what size the motor is and what it came in . so that I have a application to buy parts for it like timing chain. etc.I have been plowing with it for about 15 yrs. oil pan leaks I have always timed it for a small block I be leave 4 1/2 be fore tdc. timing cover is missing timing indicator . and I have a stock replace meant so I figured if I am going to replace the oil pan and the timing cover I might as well do the gears so any help would be great. thank you bob